Fix : Warning messages : Undefined array key “insert”

Here is a quick fix without modifying the plugin for these warning messages :

Warning: Undefined array key “insert” in /wp-content/plugins/wp-word-count/public/class-wpwc-public.php on line 123

Add to your functions.php of the theme :

add_action('init', function() {
    $option = get_option('wpwc_reading_time', []);
    
    // add a default value to "insert"
    if (!isset($option['insert'])) {
        $option['insert'] = 'N'; // valeur par défaut
        update_option('wpwc_reading_time', $option);
    }
});